Parser error

[josdejong]

Thanks for this library, I really like this solution where you can provide a query as string.

In the docs I see this example:

var query = $objeq("'^Ro' =~ name -> name + ' is ' + age"); // OK

which works fine. However, turning around property and value in the comparison does not work:

var query = $objeq("name ~= '^Ro' -> name + ' is ' + age"); // ERROR

[kode4food]

Please see: The Language Reference

This was done intentionally (a deviation from Ruby) because Objeq isn't parsing the Regular Expressions as part of its lexing pass. Instead, it's just taking the string (or expression result) and constructing a new RegExp instance from it. Because of this, there's no way to disambiguate a string from a Regex, and therefore the ordering is necessary.

[josdejong]

ah I understand. That's a pity, name ~= '^Ro' feels much more natural to me :(.

Maybe you could add support for regexp notation like JavaScript has, like:

var query = $objeq("name ~= /^Ro/ -> name + ' is ' + age");

Thanks for your fast reply.

[kode4food]

Though the reverse ~= operator isn't part of Ruby as far as I know, it has a certain aesthetic appeal to it that I very much like. Lexing regular expressions might be a huge pain in the ass, but it's worth a shot.

[josdejong]

Yes, this ~= operator is nice. I thought though the that its meaning was "about equal", which makes sense too in the context of a regexp.

You may not need to do any lexing for the regular expressions at all, just interpret the contents between the forward slashes like a string and feed it to a new RegExp(...).